Modifications:
Casted on for XL.
Stopped Increasing in the yoke, at 364stutches, which is very close for the number of stitches to be a size L.

Color work in the yoke only.
I knitted the yoke a few centimeters deeper than the pattern says, before I separated for the sleeves.

I knitted balloon sleeves, no decreases until the last round before the rib.
Decreasing before rub; I knitted 2tog all round, decreased to half the stitches in one round.

Body: cropped body. I had 14 more stitches in the front than in the back, to fit my body better.
Rib separated. Knitted front and back rib. A bit longer rib in the back.

Cropped and loose fit.